Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Laser flash effects on laser speckle shift visual evoked potential.

E T Schmeisser

    American Journal of Optometry and Physiological Optics
    |October 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Detection of ophthalmoscopically occult maculopathy by focal electroretinography.

    Documenta ophthalmologica. Advances in ophthalmology·2002
    Same author

    Fractal analysis of eye movements during reading.

    Optometry and vision science : official publication of the American Academy of Optometry·2002
    Same author

    Corneal topographic changes after extraocular muscle surgery.

    Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·1999
    Same author

    Visual system effects of exercise on Mauna Kea at 2,200 and 4,200 meters altitude.

    Military medicine·1997
    Same author

    Evaluation of a delivery system providing long-term release of cyclosporine.

    Archives of ophthalmology (Chicago, Ill. : 1960)·1996
    Same author

    Visual system electrodiagnosis in neurologic disease of childhood.

    Pediatric neurology·1995

    Ultra-short pulsed lasers at maximum permissible exposure (MPE) minimally disrupted visual evoked potentials (VEP) in monkeys, with rapid recovery. Continuous laser light, however, caused significant VEP depression and slow recovery.

    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Laser Physics

    Background:

    • Visual evoked potentials (VEP) assess visual pathway function.
    • Laser safety standards are crucial for protecting vision.
    • Understanding laser effects on vision is vital for occupational and consumer safety.

    Purpose of the Study:

    • To investigate the impact of pulsed and continuous laser exposure on VEPs in non-human primates.
    • To compare the effects of different laser types (neodymium vs. argon) and exposure durations on visual processing.
    • To determine the recovery time of VEPs after laser exposure at maximum permissible exposure (MPE) levels.

    Main Methods:

    • VEPs were recorded from cynomolgus monkeys exposed to a moving laser speckle field.
    • A 5-pulse flash train of a neodymium laser (532 nm) at MPE was superimposed on the stimulus.

    Related Experiment Videos

  • A second experiment used an argon laser (514 nm) as both stimulus and flash source at MPE for 250 ms.

    • Main Results:

    • Pulsed neodymium laser exposure caused minimal VEP disruption (magnitude and phase), with recovery within 300 ms.
    • Continuous argon laser exposure severely depressed VEPs (97%) and degraded phase lock, with recovery taking over 3 seconds.
    • VEP recovery was significantly faster for pulsed laser exposure compared to continuous argon laser exposure.

    Conclusions:

    • Ultra-short pulsed laser exposure at MPE levels is unlikely to significantly affect visual processing of non-acuity-limited stimuli.
    • Continuous laser light, even at safe levels, can have severe and prolonged effects on visual function.
    • The findings highlight the importance of considering laser exposure duration and type when assessing visual safety.